Diane May of Brooklyn Heights, a former high school teacher who was active in St. Charles Borromeo Church and North Heights affairs, died December 24 at the age of 78.

She had been a history teacher at New Utrecht High School, a teacher of English as a second language at Washington Irving High School, and assistant director of student information services in the city’s Board of Education. At St. Charles, besides being a member of the parish council, she was a religious education instructor. She also served on the board of Cadman Plaza North.

A graduate of Hunter College High School and Hunter College, she received master’s degrees from Washington University and Pratt Institute.

She was recalled by her daughter, Margaret May, as a very caring person, very generous to others, who “was always thinking of the other person.”

Ms. May was predeceased by her husband, William, and by her brother, Arthur Raskin. She is survived by two sons, John and William, in addition to her daughter, and four grandchildren.